Pumice Castle – Prominent Geological Features of Crater Lake National Park
Of the many colorful volcanic formations in the walls surrounding Crater Lake, The Pumice Castle, on the east wall, attracts the attention of many visitors.The Pumice Castle is part of an extensive lenticular bed of fragmental pumice outcropping on the crater wall about 1,300 feet above the level of the lake, or 400 feet below the crater rim just south of Cloudcap. The bed of pumice has a maximum thickness of 190 feet … [The Pumice Castle, Nature Notes From Crater Lake, Vol. 11, No. 2, 1938]
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